scholarly journals Quadratic prismatic and hexahedral solid–shell elements for geometric nonlinear analysis of laminated composite structures

2017 ◽  
Vol 172 ◽  
pp. 282-296 ◽  
Author(s):  
Peng Wang ◽  
Hocine Chalal ◽  
Farid Abed-Meraim
Keyword(s):  
Nonlinear Analysis ◽  
Composite Structures ◽  
Laminated Composite ◽  
Solid Shell ◽  
Shell Elements ◽  
Geometric Nonlinear ◽  
Laminated Composite Structures ◽  
Geometric Nonlinear Analysis

scholarly journals A model for fast delamination analysis of laminated composite structures

2020 ◽  
Vol 53 (2) ◽  
pp. 67-84
Author(s):  
Harri Katajisto ◽  
Petri Kere ◽  
Mikko Lyly
Keyword(s):  
Composite Structures ◽  
Laminated Composite ◽  
Strain Energy Release ◽  
Element Analysis ◽  
Geometrically Nonlinear Analysis ◽  
Shell Elements ◽  
Cycle Times ◽  
Modeling Methodology ◽  
Laminated Composite Structures ◽  
Cohesive Zone Elements

Delamination is one of the major failure mechanisms for composites and traditionally the simulation requires high expertise in fracture mechanics and dedicated knowledge of the Finite Element Analysis (FEA) tool. Yet, the simulation cycle times are high. Geometrically nonlinear analysis approach, which is based on the Reissner-Mindlin-Von K´arm´an type shell facet model, has been implemented into the Elmer FE solver. Altair ESAComp software runs the Elmer Solver in the background. A post-processing capability, which enables the prediction of the delamination onset from the FEA output, has been implemented into the AltairESAComp software. A Virtual Crack Closure Technique (VCCT) specifically developed for shell elements defining the Strain Energy Release Rate (SERR) related to the different delamination modes at the crack front is used. The onset of delamination is predicted using the relevant delamination criteria that utilize the SERR data and material allowables in the form of fracture toughness. The modeling methodology is presented for laminates including initial through-the-width delamination. Examples include delamination in the solid laminate and debonding of the skin laminate in the sandwich structure. Rather coarse FE mesh has proved to yield good results when compared to typical approaches that utilize the standard VCCT or Cohesive Zone Elements.

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